Finding the Fourth Proportional to 81,190,750.44, 121,890,052.80 and 69,749,416.20
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Solution
The fourth proportional to 81,190,750.44, 121,890,052.80 and 69,749,416.20 is: 104,713,406.11
Step by Step Solution
- Step 1: Write the proportion equation
81,190,750.44 : 121,890,052.80 = 69,749,416.20 : x - Step 2: Convert to fraction form
81,190,750.44/121,890,052.80 = 69,749,416.20/x - Step 3: Cross multiply
81,190,750.44x = 121,890,052.80 × 69,749,416.20 - Step 4: Simplify right side
81,190,750.44x = 8,501,760,023,387,176 - Step 5: Solve for x
x = 8,501,760,023,387,176/81,190,750.44 - Step 6: Final answer
x = 104,713,406.11
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.